Refrigeration apparatus



Nov. 18, 19,41; GROVER AL 2,263,297

REFRIGERATION APPARATUS Filed Dec. 30, 1939 INVENTOR E///'o#' El iron 6x1, A/ber/ E. True/ave.

A TOREY Patented Nov. 18, 1941 UNITED STATES PATENT, OFFICE Elliott E. Grover, Springfield, and Albert E. Truelove, Westfield, Mass.,. assignors to Westinghouse Electric 8; Manufacturing Company, East Pittsburgh, Pa., a corporation of Pennsylvania Application December 30, 1939, Serial No. 311,880

- 13 Claims. (01 62-1) This invention relates to refrigeration apparatus and particularly to a noise damping,

mounting for the refrigerant compressor and driving motor of refrigeration apparatus.

It is an object of the invention to provide an improved mounting for a motor and compressor which will effectively dampen the noise resulting from operation of the motor and compressor.

It is another object of the invention to provide and improved mounting for a motor and compressor which are supported on a plate type condenser of a refrigerating mechanism.

It is another object of the invention to provide a resilient mounting for a motor and com-1 pressor' used in refrigeration apparatus, which mounting is assembled in thefactory and permits both shipping and installation of the complete refrigeration apparatus without adjustment of the mounting.

These and other objects are effected by the invention as will be apparent from the following description and claims taken. in connection with the accompanying-drawing forming a part of this application, in which:

Fig. l is an elevational view of a refrigerating apparatus embodying a plate type condenser and illustrating one form of our improved noise damping mounting, parts of the refrigerating apparatus being broken away for the sake .of

clearness; r Fig. 2 is a partial sectional .view of the hermetically sealed motor compressor unit shown in Fi 1;

Fig. 3 is alsectional view taken on the line III-III of Fig. 1 with parts broken away for the sake of clearness;

Fig. 4 is a side view of the motor compressor unit and the bottom of the plate condenser shownin Fig. 1; and,

Fig. 5 is an enlarged view partially in section of the snubber disposed at the top of the motor compressor unit.

-Referring specifically to the drawing for a detailed description of the invention, numeral H designates, generally, a complete refrigerating mechanism comprisinga plate type condenser l2,

an evaporator l3. and a hermetically-sealed motor compressor unit ll. As shown in Fi 2. the

motor compressor unit It comprises, for example,

A frame member I! is disposed within' ports the motor, compressor and drive shaft in operative relation.

Asshownin Figs. 1 and 2, the compressorlli compresses refrigerant gas and discharges the compressed gas through a conduit 2| which extends 'to the top of the plate condenser l2. The

plate condenser l2 preferably comprises a single sheet of steel 22- provided with flanges 23 at its vertical marginal edges and having a coil of pipe 24 welded or brazed to the sheet. The sheet 22 is preferably bent to the shape shown in Fig. 3.

liquefied by the cooling effect of the ambient at- I mosphere in which the condenser is disposed. A

screen assembly 25 is provided at the bottom of the coil 24 and communicates with a capillary tube 26 extending from the screen assembly 25 to a refrigerated shelf 21 of the evaporator 3. The capillary tube 26 restricts and controls the flow of refrigerant liquid from the coil 24 to the evaporator I3. Refrigerant is vaporized in the evaporator and cold refrigerant vapor is returned to the interior of the hemetically-sealed casing I9 through the conduit 28, preferably in heat exchange relation with the refrigerant in the capillary tube 26. The vaporized refrigerant is again compressed by'the compressor l5 and'the refrigerating cycle is repeated.

As best shown in Figs. 3 and 4, brackets 29 are bolted to the flanges 23 of the condenser plate 22 near the bottom thereof. A saddle 3i is bolted to thebrackets 29 and extends over the top of v 5 l4 and to dampen noises incident to its opera- :rubber body having plates 35 vulcanized at opposite faces thereof, which plates are provided with threaded studs 36. Such a rubber mounting affords limited relative movement between the motor compressor'unit I4 and the brackets 29 and effectively dampens the noise due to vibrations resulting from the unbalanced masses of the compressor l5 and motor l6.

We have found, however, that for such a mounting to be most eifective, the resilient connections 32 should be so disposed that a line two ,resillent mountings 32, preferably passing between them passes substantially through the center of'gravity of the motor compressor unit I4 and substantially perpendicularly to the drive shaft II. By so disposing the resilient connections 32, the noises due to vibrations caused bythe unbalanced masses contained in the motor compressor unit It transmit torsional movement to the resilient connections 32 and are effectively dampened.

In order to limit the torsional movement thus transmitted, a snubber generally indicated at 31. is disposed at the top of the motor compressor unit. A bracket 38 is welded to the top of the motor compressor unit and supports a cup 39, the center of which is at a point directly above the center of gravity of the motor compressor unit l9 and in the same plane as the resilient connections 32. In other words, a plane passed between the resilient connections 32 and the center of the cup 39 would pass through the center of gravity of the motor compressor unit "and would be substantially perpendicular to the drive shaft I1.

A resilient connection, generally indicated at ll, extends between the cup 38 and the saddle 3|, the studs 36 of the resilient connection 4| being threaded into the bracket 38 and the sadweight of the motor compressor unit [4, although after the apparatus is inoperation for a considerable period of time, the resilient connections 32 may stretch slightly and place the resilient connection 4| under a small amount of tension.

From the foregoing, it will be apparent that we have provided an improved noise-damping I mounting for the motor compressor unit of refrigeration apparatus and especially of refrigeration apparatus wherein the motor compressor unit is mounted on a plate type condenser.

form, it will be obvious to those.skilled in the art that it is not so limited, but is susceptible of various changes and modifications without departing from the spirit thereof, and we desire,

therefore, that only such limitations shall be placed thereupon as are. specifically set forth in the appended claims.

What we claim is:

1. In a motor compressor unit mounting, the

3. In a motor compressor unit mounting, the combination of a compressor, a motor for driving the compressor, a drive shaft extending between the motor and the compressor, a structure for retaining the motor and compressor as an operative unit, a rigid structure for supporting the motor compressor unit and a noise damping mounting for the motor compressor unit compressor apply rotational torque to the connec-' tions.

- motor compressor unit, a noise damping mount 4. In a motor compressor unit mounting, the

combination of a compressor, a motor for driving the compressor, a drive shaft extending between the motor'and the-compressor, a structure for retaining the motor and compressor as an operative unit, a rigid structure for supporting the connections support the major portion of the While we have shown our invention in but one i combination of a compressor, a motor for driving f the compressor, a drive shaft extending between the motor and the compressor, a structure for retaining the motor and compressor as an operative unit, a rigid structure for supporting the motor compressor unit and a noise damping mounting for the-motor compressor unit comprising two resilient connections extending beweight of the motor compressor unit and are so disposed that a line between them passes through the center of gravity of the motorcompressor unit and is perpendicular to the centerline of the drive shaft, said resilient connections being positioned an appreciable distance from said compressor and opposite the side of the drive shaft, so that vibrations produced by the unbalanced mass of the compressor apply rotational torque to. the connections, and means for limiting ro-,

tational movement about said resilient connections. I

5. In a motor compressor unit mounting, the combination of a compressor, a motor for driving the compressor,.a drive shaft extending between the motor and the compressor, a structure for retaining the motor and compressor as an operative unit,- arigid structure for supporting the motor compressor unitand a noise damping mounting for the motor compressor unit comprising two resilient connections extending between said unit and said rigid supporting structure, which connections support the major portion of the weight of the motor compressor unit compressor unit and is perpendicular to the cen.

terline of the drive shaft, said noise damping mounting including a third resilient connection tween said unit and said rigid supporting structure, which connections support the major ,por-

tion of theweight of the motor compressor unit between the motor compressor unit and the rigid supporting structure, which connection supports little or none of the weight of the motor compressor unit but limits the magnitude of oscillatory, movement about said first tworesilient I connections.

the motor compressor unit and a noise damping prising two resilient connections extending between said .unit and said rigid supporting structure, which connections support the major portionof the weight of the motor compressor unit and are so disposed that a line between them passes through the center of gravity of the motor tending between said unit and said rigid supcompressor unit and is perpendicular to the centeriine of the drive shaft, said noise damping mounting including a third resilient connection between the motor compressor unit and the rigid supporting structure, which connection supports little or none of the weight of the motor compressor unit but limitstlie magnitude of oscillatory movement about said first two resilient connections, said third connection being so disposed thatv a plane between the first two connections and the third connection passes through the center of gravity of the motor compressor unit and is perpendicular to said drive shaft.

,7. In a motor compressor unit mounting, the

' combination of a compressor, a motor for driving the compressor, a drive shaft extending between the motor and the compressor, a structure for retaining the motor and compressor as an operative unit, a rigid structure for supporting the motor compressor unit and a noise damping mounting for the motor compressor unit comprising two resilient connections extending between said unit and said rigid supporting structure, which connections support the major portion of the weight of the motor compressor unit and are so disposed that a line between them passes through the center of gravity of the motor compressor unit and is perpendicula to the centeriine of the drive shaft, and said 1' silient conabout said first two resilient connections.

I .8. In a motor compressor unit mounting, the

' combination of a compressor, a motor for driving the compressor, a drive shaft extending between the motor and compressor, a hermeticallysealed casing for enclosing; and supporting the motor and compressor, arigid structure for supporting the hermetically-sealed casing, and a noise damping mounting for the hermeticallyseaied casing comprising two resilient connecporting structure, which'connections support the major portion of the weight of the motor compressor unit and are so disposed that a line between them passes through the center of gravity of the motor compressor unit and is perpendicular to a plane parallel to the centerline of the drive shaft.

10. In a motor compressor unit mounting for refrigeration apparatus, including a condenser and an evaporator and refrigerant conduit connections between the motor compressor unit,

condenser and evaporator, the combination of a compressor, a motor for driving the compressor, a drive shaft extending between the motor and compressor, a structure for retaining the motor and compressor as an operative unit, a rigid structure for supporting the motor compressor unit and a noise damping mounting for the motor compressor unit comprising two resilient connections extending between said unit and said rigid supporting structure, which connections support the major portion of the weight of the motor compressor unit and are so disposed, that a line between them passes through the center of gravity of the motor compressor unit and is perpendicular to the centerline of the drive shaft, said resilient connections being positioned an appreciable distance from said compressor and opposite the drive shaft, so that vibrations produced by the unbalanced mass of the compressor apply rotational torque to the connections and some of said refrigerant conduits being coiled around the resilient connections.

11. In a motor compressor unit mounting for refrigeration apparatus, including a condenser and an evaporator and refrigerant conduit con-- provided thereon and a noisedampingxmounting tions extending between said hermetically-sealed casing and said rigid supporting structure, which connections support the major portion .of the weight of the motor, compressor and hermetically-sealed casing and 'are'so disposed that a line between them passesthrough the center of gravity of the motor, compressor and hermeti cally-sealed casing and 'is substantially perpendicular to a plane parallel to the centerline of the drive shaft.

9. In a motor compressor unit mounting, the combination of a compressor, a motor for driving the'compressor, a horizontal drive shaft ,extending between the motor and compressor, a structure for retaining the motor and compressor as an operative unit, a rigid structure for supporting the motor compressor unit and a noise damping mounting for the motor compressor unit comprising two resilient connections exfor the motor compressor unit comprising two resilient connections extending between said unit and said plate condenser, which connections support the major portion of the weight of the motor compressor unit and are so disposed that a line between them passes through the center or gravity of the motor compressor unit and is perpen- 'dicular to the centerline of the drive shaft, said resilient connections being positioned an appreciable distance from said compressor opposite the drive shaft, so that vibrations produced by the unbalanced mass of the compressor apply rotational torque to the connections.

, 12. -In a motor-compressor mounting, the combination of a compressor having a cylinder and i a piston oscillated therein, driving means for said compressor, connecting structure between said compressor and driving means to'combine 1 ports located on opposite sides of the center of gravity of said unit, said two resilient supports being so disposed that a straight line drawn between them is a substantial distance from a ing connection between said unit and said supresilient supports.

' -porting'structure comprising two spaced-apart resilient supports stressed in shear by the gravitational forces on said unit, the two supports being=so located that a straightline connecting them is horizontal, passes through the center of mass of said unit, and is spaced at all points a substantial distance from a line coinciding with the axis of said cylinder, so that the vibrational movement of said unit induced by said oscillating piston produces a torsional movement in said ELLIOTT E. GROVER. ALBERT E. TRUELOVE. 

